I already have the most recent version installed => 1.9.0. Below is what appears in my WP plugins panel. Notice the “View version 1.9.0 details or update now.”??? Makes no sense – I already have 1.9.0 installed and it shows that.

Popup by Supsystic
Settings | Deactivate | Edit | supsystic.com | | |
The Best WordPress popup plugin to help you gain more subscribers, social followers or advertisement. Responsive popups with friendly options

I just implemented an exit popup on one of our sites and it works just fine. Don’t know what you mean by “settings failure of your WordPress site and/or your server.”

Why would WP report “There is a new version of PopUp by Supsystic PRO available. View version 1.9.0 details or update now.” when 1.9.0 is the Pro version installed? If the main plugin controls versioning why is there any pro version reporting at all? Shouldn’t it just be activated vs. not activated?

The following plugins have new versions available. Check the ones you want to update and then click “Update Plugins”.

Update Plugins

Select All
Select PopUp by Supsystic PRO
PopUp by Supsystic PRO
You have version 1.9.0 installed. Update to 1.9.0. View version 1.9.0 details.
Compatibility with WordPress 4.8.2: 100% (according to its author)